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<a name="MN10300-Options"></a>
<div class="header">
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<hr>
<a name="MN10300-Options-1"></a>
<h4 class="subsection">3.19.30 MN10300 Options</h4>
<a name="index-MN10300-options"></a>

<p>These <samp>-m</samp> options are defined for Matsushita MN10300 architectures:
</p>
<dl compact="compact">
<dd><a name="index-mmult_002dbug"></a>
</dd>
<dt><code>-mmult-bug</code></dt>
<dd><p>Generate code to avoid bugs in the multiply instructions for the MN10300
processors.  This is the default.
</p>
<a name="index-mno_002dmult_002dbug"></a>
</dd>
<dt><code>-mno-mult-bug</code></dt>
<dd><p>Do not generate code to avoid bugs in the multiply instructions for the
MN10300 processors.
</p>
<a name="index-mam33"></a>
</dd>
<dt><code>-mam33</code></dt>
<dd><p>Generate code using features specific to the AM33 processor.
</p>
<a name="index-mno_002dam33"></a>
</dd>
<dt><code>-mno-am33</code></dt>
<dd><p>Do not generate code using features specific to the AM33 processor.  This
is the default.
</p>
<a name="index-mam33_002d2"></a>
</dd>
<dt><code>-mam33-2</code></dt>
<dd><p>Generate code using features specific to the AM33/2.0 processor.
</p>
<a name="index-mam34"></a>
</dd>
<dt><code>-mam34</code></dt>
<dd><p>Generate code using features specific to the AM34 processor.
</p>
<a name="index-mtune-11"></a>
</dd>
<dt><code>-mtune=<var>cpu-type</var></code></dt>
<dd><p>Use the timing characteristics of the indicated CPU type when
scheduling instructions.  This does not change the targeted processor
type.  The CPU type must be one of &lsquo;<samp>mn10300</samp>&rsquo;, &lsquo;<samp>am33</samp>&rsquo;,
&lsquo;<samp>am33-2</samp>&rsquo; or &lsquo;<samp>am34</samp>&rsquo;.
</p>
<a name="index-mreturn_002dpointer_002don_002dd0"></a>
</dd>
<dt><code>-mreturn-pointer-on-d0</code></dt>
<dd><p>When generating a function that returns a pointer, return the pointer
in both <code>a0</code> and <code>d0</code>.  Otherwise, the pointer is returned
only in <code>a0</code>, and attempts to call such functions without a prototype
result in errors.  Note that this option is on by default; use
<samp>-mno-return-pointer-on-d0</samp> to disable it.
</p>
<a name="index-mno_002dcrt0"></a>
</dd>
<dt><code>-mno-crt0</code></dt>
<dd><p>Do not link in the C run-time initialization object file.
</p>
<a name="index-mrelax-2"></a>
</dd>
<dt><code>-mrelax</code></dt>
<dd><p>Indicate to the linker that it should perform a relaxation optimization pass
to shorten branches, calls and absolute memory addresses.  This option only
has an effect when used on the command line for the final link step.
</p>
<p>This option makes symbolic debugging impossible.
</p>
<a name="index-mliw"></a>
</dd>
<dt><code>-mliw</code></dt>
<dd><p>Allow the compiler to generate <em>Long Instruction Word</em>
instructions if the target is the &lsquo;<samp>AM33</samp>&rsquo; or later.  This is the
default.  This option defines the preprocessor macro <code>__LIW__</code>.
</p>
<a name="index-mno_002dliw"></a>
</dd>
<dt><code>-mno-liw</code></dt>
<dd><p>Do not allow the compiler to generate <em>Long Instruction Word</em>
instructions.  This option defines the preprocessor macro
<code>__NO_LIW__</code>.
</p>
<a name="index-msetlb"></a>
</dd>
<dt><code>-msetlb</code></dt>
<dd><p>Allow the compiler to generate the <em>SETLB</em> and <em>Lcc</em>
instructions if the target is the &lsquo;<samp>AM33</samp>&rsquo; or later.  This is the
default.  This option defines the preprocessor macro <code>__SETLB__</code>.
</p>
<a name="index-mno_002dsetlb"></a>
</dd>
<dt><code>-mno-setlb</code></dt>
<dd><p>Do not allow the compiler to generate <em>SETLB</em> or <em>Lcc</em>
instructions.  This option defines the preprocessor macro
<code>__NO_SETLB__</code>.
</p>
</dd>
</dl>

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